Stitching-jack



(No Model) A. R. KNADLER. STITGHING JACK.

No. 551,389. Patented Bee. 1'], 1895.

Witnesses:

Attorney.

INDIE SGHAIIMJHDYO'UTND WASHINGTDNJIC.

UNITED STATES- PATENT OFFICE.

ALVIN R. KNADLER, OF PERU, INDIANA.

STITCHING-JACK.

SPECIFICATION forming part of Letters Patent No. 551,389, dated December 1'7, 1895.

Application filed May 21, 1895. Serial No. 550,030. No model) To all whom it may concern:

Be it known that I, ALVIN R. KNADLER, a citizen of the United States, residing at Peru, in the county of Miami and State of Indiana, have invented a new and useful Stitching- Jack, of which the following is a specification.

My invention relates to an improved leatherworkers stitching-jack; and it has for its object the production of a stitching-jack well adapted for farmers use, and for use in livery stables and in other like places, it being capable of being placed upon a chair, box, bench, or other like article, and operated by means of a hand-lever, in contradistinction to stitching-jacks of the class inseparably connected with a heavy horse and operated by means of a foot-lever.

The invention will first be described in connection with the accompanying drawings, and then pointed out in the claim.

Figure l of the drawings isa perspective view of a stitching-jack constructed in accordance with my invention. Fig. 2 is a side elevation of the same.

Referring to the drawings, A represents the base of the jack, which consists of a piece of plank capable of being screwed or otherwise secured to a chair, box, or other like support. To the base, near one edge thereof, is secured in any suitable manner, preferably by mortising, the clamp-block B, from the upper edge of which rises the stationary clampingjaw O of the clamp, this jaw C and block B being preferably formed integral. To the edge of the block B, opposite the jaw C, is hinged, as at d, the movable clamping-jaw D, the upper ends of the jaws O and D being turned inward, as at c, to form the clampingface, as is usual in clamps of this kind. E is a coiled spring secured between the jaws G and D, serving to normally hold the clamping-jaws apart.

F is an operating-strap, secured at one end to the inner side of the movable jaw D, passing through the coiled spring E, and through an opening f in the jaw 0, its other end being secured to a handlever Gpivoted on a bar 9 secured to the clamp-block E.

II represents a bracing-bracket, secured at one end to the base A, projected vertically a short distance and then turned inward at a right angle and secured at the end to the stationary jaw O of the clamp. On the inner side of the vertical portion this bracketis provided with ratchet-teeth h, with which a plate g, secured on lever G, is adapted to engage in operation.

The operation of my stitching-j ack is as follows: The material to be worked is placed between the clamping-surfaces c of the jaws C and D, and the operator, pressing with his hand upon the lever G, brings the jaws tightly together, and causes the plate 9 to engage one of the teeth h, thus causing the jaws to tightly clamp the material, no further action on his part being necessary to hold the clamping-jaws together. IVhen it is desired to release the material, by simply disengaging the plate on the lever from the ratchet-teeth permits the spring E to act, causing the jaws to open, which releases the material.

It is evident from the above description that I am enabled to construct my stitchingjack very light and portable, permitting me to dispense with the usual heavy horse or bench,and that the bracket H is so constructed and positioned as to serve not only as a ratchetbar for the lever, but as a very effective brace for the stationary jaw O, by which I am enabled to construct the parts much lighter than has been heretofore possible and yet maintain the requisite amount of strength necessary in jacks of this class.

' Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a stitching-jack, a base capable of being screwed or otherwise secured to a chair, table, or other like support, a clamp-block secured in said base and having a stationary clamping-j aw formed integral therewith, a movable clamping-jaw hinged to the clamp-block, a bracing-bracket secured at one en d to the base and at the other end to the stationary clamping-j aw, said bracket being provided on its inner side with toothed pro j ections,a hand-lever pivotally secured at one end to the clampblock and having a projecting plate adapted to engage the teeth on the bracket inoperation, and an operating-strap connecting the movable clamping-jaw and said hand-lever, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

ALVIN R. KNADLER. Witnesses A. GEHRING, ELI J. JAMisoN. 

